Number of 4-voter voting schemes with n linearly ranked choices.

Terms

a(0) =1a(1) =12a(2) =81a(3) =372a(4) =1332a(5) =3984a(6) =10420a(7) =24540a(8) =53145a(9) =107436a(10) =205065a(11) =372792a(12) =649936a(13) =1092672a(14) =1779408a(15) =2817288a(16) =4350105a(17) =6567660a(18) =9716905a(19) =14114892a(20) =20163924a(21) =28368912a(22) =39357396a(23) =53902212a(24) =72947329a(25) =97636812a(26) =129347505a(27) =169725360a(28) =220726080a(29) =284659968